The error you reported was when you were processing Project: 10030 (Run 102, Clone 0, Gen 4), then there were two more errors with unknown WUs, then a success with Project: 10031 (Run 903, Clone 0, Gen 6)

Project: 10030 (Run 102, Clone 0, Gen 4) was reassigned and others have had trouble with it, so it's a bad WU.

Which WUs were being processed for the other two errors? (Perhaps the same one?)